Yong Sun Choi

3 Patents

• US125947232026

  Powder Distribution Device and 3D Printing Device Including Same

  SAMYOUNG MACHINERY CO., Ltd.

  0 cites
• US122599172025

  Method of Retrieving Document and Apparatus for Retrieving Document

  42Maru Inc.

  0 cites
• US115694202023

  White Light Source and Illumination Apparatus for Lighting in Lithography Process

  GLBTECH CO., Ltd.

  0 cites